Groups - DRAFT-03-07-13-Minutes-RIM-Subcommittee-1.doc uploaded

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        Please review these minutes from the March 7, 2013 meeting of the Reference Information Model Subcommittee for approval at our next meeting, subject to any specified changes. Thanks!
        

-- Jeff Waters
        
    

    
        Document Name: DRAFT-03-07-13-Minutes-RIM-Subcommittee-1.doc

        
        Description

        At the March 7, 2013 meeting of the Reference Information Model

Subcommittee, the members discussed the following topic: 

1.  TOPIC: Refined Guidance for Standards Developers regarding when to use

Enumerations v. ValueLists v. Layers: 

(a) If there is a reasonable default enumeration for a required element,

use the enumeration, but make sure the enumeration includes ?UNKNOWN? and

?EXTENSION?. Users should only use ?UNKNOWN? when they truly do not know

the value. Users should use ?EXTENSION? when the defaults are so far off

the intended meaning that no reasonable default value can be chosen and the

local community value is provided in an extension ?layer?. 

(b) If there isn?t a reasonable default enumeration for an element, use a

ValueList. (Here you are expected to use a local ValueList to implement

your local community needs.)

(c) Allow for (zero or more) "Layer" elements in your new standard,

utilizing the "Layer" element and structure defined in the CommonTypes. 

The point of this guidance is to encourage use of default values in the

body of the standard and place the local community values in the extensions

enabled by the Parameter Name/Value fields (i.e. Layers). This maintains as

much interoperability as possible for recipients unfamiliar with the local

community values but also provides flexibility for local communities to use

their own terminology for those who understand it. 

References:

(1) Norm Paulsen's ?Environment Canada Layer? document summarizing the

?Layers? concept:

https://www.oasis-open.org/apps/org/workgroup/emergency-rim/download.php/47099/Environment%20Canada%20Layer(3).doc

(2) Doug Allport's email summarizing ?Layers?:

https://lists.oasis-open.org/archives/emergency/201206/msg00020.html

(3) Draft ?EDXL Extensions? document, summarizing and proposing the use of

?Layers? as one of two primary EDXL Extension mechanisms along with

ValueLists:

https://www.oasis-open.org/apps/org/workgroup/emergency-rim/download.php/47583/EDXL_Extensions_Draft_ver_1.doc

(4) A draft implementation of the DE 2.0 with ?Layers? (but not yet revised

to comply with the enumerations guidance above and utilizing a draft

implementation of a ?Layer? element in the common types schema)

https://www.oasis-open.org/apps/org/workgroup/emergency-rim/download.php/46846/edxl-de-v2.0-wd10.zip

(5) The DE 2.0 Basics White Paper, revised to include the ?Layers? concept

(but not yet revised to comply with the enumerations guidance above)

https://www.oasis-open.org/apps/org/workgroup/emergency-rim/download.php/46851/DE_2.0_Basics_Draft_ver_10.doc

(6) More information on the ?Layers? concept can be found at the website of

the Canadian Association for Public Alerting and Notification

(http://www.CAPAN.ca )        

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        Submitter: Jeff Waters

                Group: EM Reference Information Model SC

        Folder: Meeting Notes

        Date submitted: 2013-03-07 17:58:26